Naya Rivera’s memoir Sorry Not Sorry: Dreams, Mistakes, and Growing Up contains many juicy revelations from the actress, but one that’s certainly set to interest ‘Glee’ fans concerns her strained relationship with co-star Lea Michele.

Naya RiveraNaya Rivera has said she and Lea Michele didn't always see eye-to-eye on ‘Glee’

"I don't hate Lea, and I never have," Rivera writes in the book. "We are both strong-willed and competitive — and that's not a good mixture. When two people with strong personalities are friends, they're eventually going to clash.

“And maybe they'll get over it; maybe they won't. Lea and I didn’t." Rivera said that problems between the stars got worse when her character, Santana Lopez began to get more screen time on the show.

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"I think Rachel — erm, I mean Lea — didn't like sharing the spotlight," Rivera continued. ”She had a hard time separating work from our outside friendship…Lea was a lot more sensitive, though, and sometimes it seemed like she blamed me for anything and everything that went wrong.

"If I'd complained about anyone or anything, she assumed I was bitching about her. Soon she started to ignore me, and eventually it got to the point where she didn't say a word to me for all of season six.”

However Rivera did support Michele’s relationship with her friend Corey Monteith, feeling it would be a stabling influence in his life. "The more serious they got, the less Cory hung out with us and the more he seemed like a different person,” she wrote.

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“One year he came back from the break between seasons super skinny. He said he'd been spending a lot of time at the gym and was trying to be responsible — not spending money all the time and buying crazy cars like he used to.

"My personal feelings for Lea aside, I knew that she wasn’t a partier, so I felt like maybe their relationship could actually be good for him," Rivera added. "I was happy for Cory to have a stable influence in his life, wherever it was he found it.”